40's Pickup door glass - Channel or no Channel?

[411Ton]

Ive seen lots of pictures of 40-47 trucks, some with the channel on the door glass, some without. My research seems to indicate that in 1942, the channel was chrome plated steel and the doors themselves along with the regulators were changed to accommodate. So 40/41 doors are unique in this regard, and unless you're changing the complete door and glass to the later channel style, you have to source 40/41 door hardware. Does the Hive agree?